Ginsco 200pcs 3 Size Heat Shrink Butt Connectors Kit Electrical Insulated Wire Terminal 10-22 AWG Set Dual-walled design, polyolefin tubing in outside and hot melt adhesive in inside. Allows visual inspection, prevents corrosion, and provided a waterproof seal.These work great for automotive, marine, and many other applications. All packed in a plastic container for easy organization and storage. 3 Sizes: Red 22 - 18 AWG (90pcs), Blue 16 - 14 AWG (90pcs), Yellow 12 - 10 AWG (20pcs)